Pallet Sled Ratchet Mechanism for Confined Space Maneuverability
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Solution Overview
Problem
Existing pallet handling systems lack efficiency and portability, particularly when it comes to moving half-pallets from trucks to store back rooms and onto shelves, as they are often bulky and difficult to maneuver in confined spaces.
Innovation Solution
A pallet sled with a lower frame supported by wheels, an upper frame for supporting pallets, and a ratchet mechanism operated by a handle that allows the upper frame to be lifted and lowered, along with retractable components to facilitate storage and portability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional pallet handling systems are used, then pallets can be moved from trucks to store back rooms, but the systems are bulky and difficult to maneuver in confined spaces
Solution Approach 1:
The device is divided into two separate frames: a lower frame with wheels for mobility and an upper frame for supporting the pallet. This segmentation allows each component to be optimized independently - the lower frame can be compact for maneuverability while the upper frame provides necessary support functionality.
Solution Approach 2:
The upper frame is made movable relative to the lower frame through a ratchet mechanism that allows the upper frame to be raised and lowered. This dynamic configuration enables the device to adapt to different operational positions while maintaining a compact form when not in use.
2Volume of moving object
If the pallet sled includes retractable components for portability, then it can fit in vehicle trunks or backseats, but the structure becomes more complex
Solution Approach 1:
The handle is separated into a distinct component that can be folded or removed independently from the main frame structure. This segmentation allows the handle to be stowed without affecting the core functionality of the frames and ratchet mechanism.
Solution Approach 2:
The handle is designed with folding capability, transforming from a rigid extended component to a compact folded position. This dynamic transformation reduces the overall storage volume while maintaining full functionality during operation.
3Ease of operation
If the ratchet mechanism is used to lift the upper frame, then pallets can be elevated for loading, but the mechanism adds complexity to the device
Solution Approach 1:
The ratchet mechanism is designed to be self-latching, automatically securing the upper frame at the desired height without requiring additional locking components or complex control systems. The pawl and gear work together to maintain position passively once engaged.
Solution Approach 2:
The complex motorized lifting systems are replaced with a simple manual ratchet mechanism that provides sufficient lifting capability through mechanical advantage, reducing overall system complexity while maintaining functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The pallet sled enables efficient and portable handling of half-pallets, allowing for easy movement into tight spaces and efficient unloading and restacking of goods, while also being compact enough to fit in vehicle trunks or backseats.
Implementation Method 1
The pawl may be biased toward the gear when the ratchet is in a lifting mode. The pawl may be biased away from the gear when the ratchet is in a lowering mode.
Implementation Method 2
The outer plate may be coupled to a spring configured to bias the pawl toward and away from the gear. The spring may be configured such that it biases the pawl toward the gear when the first end of the spring is in a first position and such that it biases the pawl away from the gear when the first end of the spring is in a second position, spaced away from the first position.
Implementation Method 3
The ratchet may include a gear and a pawl. The ratchet may also be configured to selectively lower the upper frame.
Implementation Method 4
A ratchet is configured to lift the upper frame relative to the lower frame. A handle is configured to operate the ratchet to lift the upper frame relative to the lower frame.
Implementation Method 5
A pallet sled includes a lower frame and a plurality of wheels supporting the lower frame.
Data Source
AI summary
A pallet sled includes a lower frame and a plurality of wheels supporting the lower frame. An upper frame is configured to support a pallet thereon. A ratchet is configured to lift the upper frame relative to the lower frame. A handle is configured to operate the ratchet to lift the upper frame relative to the lower frame. The handle may be pivotable relative to the lower frame. The ratchet may include a gear and a pawl. The ratchet may also be configured to selectively lower the upper frame. As another option, one or more of the handle, the upper frame or the plurality of wheels are reconfigurable between an extended position and a retracted position.